Troll, I see your point. I can remember Tipper Ogre (no typo...) and her fight against the evils of music in the early nineties when I was a teenager and still living with my parents. That's a far reaching influence given that I lived in a village in the arsehole of nowhere in Northern Ireland. I was a bit of a Metal Chick then, and my sister and I would arrive home with all manner of scruffy, long-haired leather-clad blokes, but to my parents' credit they never batted an eyelid. My mother was well aware of the music I listened to - I was playing it loud enough (whereas my da just thought it was "noisy"). If she objected to anything, it was my shite taste in music (though she seemed to like most of the ballads!). They were well aware that I could hear explicit language outside of song lyrics. I think they just accepted it as a phase, and rightly so - sometimes I listen to it now, but the shocking stuff now sounds rather pathetic.
My mammy is a librarian and hears demands for censorship as part of her job. Her theory is if you can read the print, you can read the book. Perhaps that's why my attitude on imposed censorship AND warnings is that until I regard the person doing the censoring/warning as superior to my judgement in every way, I don't want them telling me what to do. Unless they can prove that they know better than me, I'll take my chances. Real life is tough. And if they're so worried by violence affecting young minds, well the Old Testament is a bit grim...

(As for Marilyn Manson, I had no idea he was supposed to be serious. I thought he was a comedy act! Besides, isn't his real name Brian?*BG*)